obama says he wants a four-stage missile defense system in europe to defend against iranian missiles. but that fourth stage in particular, there is a chance that president obama might rethink, based on his comment in korea. whereas romney seems to be very firmly committed to all four stages. but that's a pretty modest disagreement since they're both going to deploy the first three stages of this system. so, you know, it's a little bit tough to actually translate their apparent big rhetorical disagreement into actual policy differences. >> it will be interesting to hear if it is mentioned tonight and see if there are some nuances that really speak to differences in either campaign or whether or not as you mentioned, maybe it is just rhetoric as could be, definitely, in campaign season. michael, always nice to have you. thank you. >> thanks, jenna. jon: here's something else we hear a lot during campaign season. this one especially, liar, liar. that charge leveled a lot in the race for the white house this time around. does the terrell cross the line? we'll get a fair and balanced debat